X9259 Datasheet, PDF (11/21 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) Potentiometers

X9259
Instruction Format
Read Wiper Counter Register (WCR)
S ^{Device Type}
T ^Identifier
A
Device
Addresses
Instruction
S Opcode
A
DR/WCR
Addresses
Wiper Position
S (Sent by X9259 on SDA) M S
A _WWWWWWWW A T
R0
T
1
0
C
1 A3 A2 A1 A0 _K 1
0
0
1
0
0
P1
P0
C
K
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
K
O
P
76543210
Write Wiper Counter Register (WCR)
S
T
A
R
T
Device Type
Identifier
0101
Device
Addresses
A3 A2 A1 A0
S
A
C
K
Instruction
Opcode
1010
DR/WCR
Addresses
0 0 P1 P0
Wiper Position
S (Sent by Master on SDA) S
A _WWWWWWWW A
CCCCCCCCCC
KRRRRRRRRK
76543210
S
T
O
P
Read Data Register (DR)
S ^{Device Type}
T ^Identifier
Device
Addresses
Instruction
S Opcode
DR/WCR
Addresses
Wiper Position
S (Sent by X9259 on SDA) M S
A
R
T
0
1
0
A
C
1 A3 A2 A1 A0 _K
1
0
1
A _WWWWWWWWA T
1
RB
RA
P1
P0
C
K
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
K
O
P
76543210
Write Data Register (DR)
S
T
A
R
T
Device Type
Identifier
0101
Device
Addresses
A3 A2 A1 A0
S
A
C
K
Instruction
Opcode
1100
DR/WCR
Addresses
RB RA P1 P0
S
A
C
K
Wiper Position
(Sent by Master on SDA)
WWWWWWWW
CCCCCCCC
RRRRRRRR
76543210
S
A
C
K
S
T
O
P
Global XFR Data Register (DR) to Wiper Counter Register (WCR)
S Device Type
T Identifier
Device
Addresses
S
Instruction
Opcode
DR/WCR
Addresses
A
R0
T
1
0
A
C
1 A3 A2 A1 A0 _K 0 0 0 1 RB RA
0
0
SS
AT
CO
KP
Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the Master/Slave.
(2) “A3 ~ A0”: stands for the device addresses sent by the master.
(3) “X”: indicates that it is a “0” for testing purpose but physically it is a “don’t care” condition.
(4) “I”: stands for the increment operation, SDA held high during active SCL phase (high).
(5) “D”: stands for the decrement operation, SDA held low during active SCL phase (high).
11
FN8169.2
September 16, 2005